This sample chapter builds on several topics from the previous chapters to build a nice Amazon shopping cart example that allows you to shop on Amazon and build a shopping cart. You could modify this easily to add the link to make the purchase at Amazon too. One important note … if you try to run the code, you will need an Amazon key since they require one to use their services and build a shopping cart. Its free and pretty easy to set up. I talk about this in the chapter, too.